CN110474169A - A kind of high-precision composite material antenna reflective face forming method - Google Patents
A kind of high-precision composite material antenna reflective face forming method Download PDFInfo
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- CN110474169A CN110474169A CN201910616955.2A CN201910616955A CN110474169A CN 110474169 A CN110474169 A CN 110474169A CN 201910616955 A CN201910616955 A CN 201910616955A CN 110474169 A CN110474169 A CN 110474169A
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- resin
- precision
- reflective face
- antenna reflective
- composite material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
- H01Q15/142—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface
Abstract
The present invention provides a kind of high-precision composite material antenna reflective face forming method, processing steps are as follows: (1) by antenna reflective face surface roughening, high-precision mold surface coats release agent；(2) mold, epoxy resin and reflecting surface are statically placed in high vacuum environment for a long time；(3) resin is imposed on into die face under high vacuum environment, and reflecting surface is pressed on resin；(4) after resin layer is paved with die face, restore normal pressure；(5) reflecting surface is demoulded after resin solidification, forms zero bubble resin layer in mirror surface.The present invention utilizes the high-precision of die face and the replication capacity of resin, obtain the reflecting surface for being equal to mould and die accuracy, resin bubble is effectively completely removed by high vacuum environment simultaneously, and duplication is completed in such circumstances, obtaining high-precision reflecting surface simultaneously, zero bubble regime of surface resin layer is realized, to solve influence of the bubble to reflecting surface sequent surface metallization and absorptivity-emissivity ratio.
Description
Technical field
The present invention relates to the surface treatment methods of space structure functor, and in particular, to a kind of high-precision composite material
Antenna reflective face forming method.
Background technique
With being constantly progressive for deep space exploration technology, demand of the mankind to heavy caliber, high-precision antenna reflector is also increasingly
Urgently.Composite material is widely used in aerospace field, at present spacecraft antenna-reflected because of characteristics such as its high-strength lights
Face comprehensive composite material.The curing molding of composite material is because solidification temperature is uneven, fiber and resin, composite material and mould
The reasons such as the coefficient of expansion mismatch of tool, often deform, this directly results in one-pass molding high-precision antenna after demoulding
Reflecting surface difficulty is very big.
One layer of resin compensation layer (is applied in mirror surface, to fill reflecting surface reality and theoretical face using replica technique
Deviation gap between type, copy mold face type) surface precision of reflecting surface can be effectively improved, it is high-precision to meet reflecting surface
The demand of degree.But be glued after traditional resin deaeration, meeting is during resin be contacted with mold, reflecting surface and resin contact
Air is introduced, in this way after solidification demoulding, surface will form a large amount of bubbles, this seriously affects the metallization of reflecting surface sequent surface
(metallization is in order to meet reflecting surface electrical property needs), and repair back reflection face absorptivity-emissivity ratio and also will receive influence.Thus
It is proposed a kind of zero bubble processing method of surface, there are bubbles to solve the problems, such as resin layer.
A kind of raising composite material antenna-reflected is disclosed in the application for a patent for invention of 109624163 A of Publication No. CN
The method of face surface smoothness, this method comprises: first high-precision composite material antenna reflective face surface is roughened,
And roughening does not allow to destroy the type face precision of antenna reflective face；Then mirror surface in the roughened uniformly coats one layer
Normal temperature solidified epoxy resin (using spraying or manual application all can), room temperature is stood until resin reaches B-stage；It will molding
The die surface of antenna reflective face coats release agent, and the high-precision antenna reflector of resin layer is put into mold after drying and is made
Standby vacuum bag heats up in autoclave suppresses (temperature is 50 DEG C, and pressure is 0.3MPa~0.7MPa), utilizes the light of mold itself
The embossability of cleanliness and epoxy resin obtains the antenna reflective face of best bright finish, for the metallization of subsequent antenna reflecting surface and accurate tune
It saves Surface absorption transmitting ratio and basis is provided.But in the method, the epoxy resin is handled by B-stage, and viscosity number can be bright
Aobvious to be greater than 2000mPas, subsequent 0.3MPa~0.7MPa curing resin layer that need to pressurize by autoclave, otherwise resin layer can be because
For viscosity is excessive and causes thickness very big, seriously affect reflecting surface thermal stability, and add biggish pressure can because reflecting surface by
Pressure generates strain and is in high-stress state, after demoulding, since stress release leads to product face type largely deviation theory
Value, makes reflecting surface surface precision be unable to satisfy high-precision use demand, therefore, the invention of 109624163 A of Publication No. CN is special
Benefit lays particular emphasis on low cost and improves surface smoothness, and simultaneously non-face type high-precision.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of high-precision composite material antenna reflective face at
Type method removes blibbing, to meet the needs of subsequent reflection face surface metalation.
The purpose of the present invention is achieved through the following technical solutions:
The present invention provides a kind of high-precision composite material antenna reflective face forming method, includes the following steps:
S1, the surface of antenna reflective face is roughened, coats release agent on high-precision mold surface；
S2, high vacuum environment will be statically placed in through step S1 treated antenna reflective face and high-precision mold and resin
In；
S3, under high vacuum environment, resin is imposed on the surface for being coated with release agent of high-precision mold, then by antenna
Reflecting surface is pressed on resin；
S4, under high vacuum environment, after resin layer is paved with the surface of high-precision mold, standing a period of time restores normal
Pressure；
S5, antenna reflective face demoulded after resin solidification, forms zero bubble resin layer on antenna reflective face surface.
Preferably, the curing reaction temperature of the resin is 15~45 DEG C, curing reaction time of the resin is 24~
48h.If being more than that this temperature range solidifies, can cause finally to demould product face because of the thermal deformation of high-precision mold and reflecting surface
Type and theoretical face type deviation increase, and temperature exceeds more, and deviation is bigger.
Preferably, MV minium viscosity of the resin in 15~45 DEG C of temperature ranges is 300~2000mPas, and described
Resin maintains when a length of 7~12h of the MV minium viscosity.Resin is minimum viscous in 15~45 DEG C of temperature ranges in the present invention
Degree is 300~2000mPas, if being lower than 300mPas, can lead to mirror surface starved because resin viscosity is too low, surpass
2000mPas is crossed, it can be because of the excessive influence deaeration effect of viscosity and resin adhesion；And viscosity maintains the duration in this range
For 7~12h, if being less than 7h, duration needed for being unable to satisfy the process flow.
Preferably, the resin includes epoxy resin.
Preferably, step S2, in S3 and S4, the absolute vacuum degree of the high vacuum environment is 0~4Pa.Higher than this range,
Bubble can not empty, and surface can remain Minute pores.
Preferably, step S2, S3 and S4 is under same high vacuum environment.Vacuum environment in these three steps cannot be sent out
It is raw to change.
Preferably, in step S2, when a length of 4~6h of the standing.
Preferably, in step S4, when a length of 0.5~1.5h of the standing.
The high-precision composite material antenna reflective face for the forming method preparation that the present invention also provides a kind of according to.
Compared with prior art, the present invention have it is following the utility model has the advantages that
The present invention answers antenna reflective face using the low viscosity epoxy resin of long operating time under high vacuum environment
Type solves the problems, such as that there are a large amount of bubbles for the conventional existing surface resin layer of sizing solidification, realizes the zero of resin layer
Bubble regime provides safeguard to improve reflecting surface surface precision and sequent surface metallization.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is zero bubble processing schematic of inventive antenna mirror surface；
Wherein, 1- antenna reflective face；2- resin layer；3- high-precision mold.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
The present invention provides a kind of high-precision composite material antenna reflective face forming method, and processing step is as follows:
S1, the surface of antenna reflective face is roughened, high-precision mold surface coats release agent；
S2, mold, epoxy resin and reflecting surface are statically placed in high vacuum environment for a long time；
S3, resin imposed on into die face under high vacuum environment, and reflecting surface is pressed on resin；
S4, after resin layer is paved with die face, stand a period of time, then restore normal pressure；
S5, reflecting surface demoulded after resin solidification, forms zero bubble resin layer in mirror surface.
Fig. 1 is zero bubble processing schematic of inventive antenna mirror surface；Figure from from top to bottom be respectively antenna-reflected
Face 1, resin layer 2 and high-precision mold 3.
Embodiment 1
It is specific as follows the present embodiment provides a kind of high-precision composite material antenna reflective face forming method:
S1, by mirror surface with sand paper uniform grinding to surface without smooth domain；
S2, will reflecting surface molding die surface cleaning after coating release agent it is spare；
S3, the epoxy resin prepared is poured on mold, the solidification temperature of the epoxy resin is 35 DEG C, at this time resin viscosity
For 1300mPas, and the when a length of 10h of the viscosity is maintained, reflecting surface is fixed on to the executing agency for being used for reflecting surface operation
On, and be placed in vacuum environment case together；
It is 2Pa that S4, vacuum environment case, which are evacuated to absolute vacuum degree in case, and temperature is 20 DEG C, and keeps 5h in this state；
S5, reflecting surface is pressed on the mold of resin using executing agency, is made in the tree between mold and reflecting surface
Rouge is extruded thinning until spreading over whole surface, this process maintains 1h；
Vacuum in S6, removal vacuum environment case, restores to normal pressure, and then temperature rises to 35 DEG C, keeps the temperature 36h to solidify tree
Rouge layer；
After the completion of S7, solidification, it is down to room temperature, is demoulded after taking-up.
Embodiment 2
It is specific as follows the present embodiment provides a kind of high-precision composite material antenna reflective face forming method:
S1, by mirror surface with sand paper uniform grinding to surface without smooth domain；
S2, will reflecting surface molding die surface cleaning after coating release agent it is spare；
S3, the epoxy resin prepared is poured on mold, the solidification temperature of the epoxy resin is 45 DEG C, at this time resin viscosity
For 300mPas, and the when a length of 12h of the viscosity is maintained, reflecting surface is fixed on to the executing agency for being used for reflecting surface operation
On, and be placed in vacuum environment case together；
It is 4Pa that S4, vacuum environment case, which are evacuated to absolute vacuum degree in case, and temperature is 20 DEG C, and keeps 4h in this state；
S5, reflecting surface is pressed on the mold of resin using executing agency, is made in the tree between mold and reflecting surface
Rouge is extruded thinning until spreading over whole surface, this process maintains 0.5h；
Vacuum in S6, removal vacuum environment case, restores to normal pressure, and then temperature rises to 45 DEG C, keeps the temperature 48h to solidify tree
Rouge layer；
After the completion of S7, solidification, it is down to room temperature, is demoulded after taking-up.
Embodiment 3
It is specific as follows the present embodiment provides a kind of high-precision composite material antenna reflective face forming method:
S1, by mirror surface with sand paper uniform grinding to surface without smooth domain；
S2, will reflecting surface molding die surface cleaning after coating release agent it is spare；
S3, the epoxy resin prepared is poured on mold, the solidification temperature of the epoxy resin is 20 DEG C, at this time resin viscosity
For 2000mPas, and the when a length of 7h of the viscosity is maintained, reflecting surface is fixed on to the executing agency for being used for reflecting surface operation
On, and be placed in vacuum environment case together；
It is 3 × 10 that S4, vacuum environment case, which are evacuated to absolute vacuum degree in case,-4Pa, temperature are 20 DEG C, and are protected in this state
Hold 6h；
S5, reflecting surface is pressed on the mold of resin using executing agency, is made in the tree between mold and reflecting surface
Rouge is extruded thinning until spreading over whole surface, this process maintains 1.5h；
Vacuum in S6, removal vacuum environment case, restores to normal pressure, keeps for 24 hours with curing resin layer；
After the completion of S7, solidification, it is down to room temperature, is demoulded after taking-up.
Comparative example 1
This comparative example provides a kind of composite material antenna reflective face forming method, specific as follows:
S1, by mirror surface with sand paper uniform grinding to surface without smooth domain；
S2, will after reflecting surface shaping mould removing surface coat release agent it is spare；
S3, the epoxy resin prepared is poured on mold, the solidification temperature of the epoxy resin is 35 DEG C, at this time resin viscosity
For 1300mPas, and the when a length of 10h of the viscosity is maintained, reflecting surface is fixed on to the executing agency for being used for reflecting surface operation
On, and be placed in vacuum environment case together；
It is 3000Pa that S4, vacuum environment case, which are evacuated to absolute vacuum degree in case, and temperature is 20 DEG C, and is kept in this state
5h；
S5, reflecting surface is pressed on the mold of resin using executing agency, is made in the tree between mold and reflecting surface
Rouge is extruded thinning until spreading over whole surface, this process maintains 1h；
Vacuum in S6, removal vacuum environment case, restores to normal pressure, and then temperature rises to 35 DEG C, keeps the temperature 36h to solidify tree
Rouge layer；
After the completion of S7, solidification, it is down to room temperature, is demoulded after taking-up.
Comparative example 2
This comparative example provides a kind of composite material antenna reflective face forming method, specific as follows:
S1, by mirror surface with sand paper uniform grinding to surface without smooth domain；
S2, will after reflecting surface shaping mould removing surface coat release agent it is spare；
S3, the epoxy resin prepared is poured on mold, the solidification temperature of the epoxy resin is 35 DEG C, at this time resin viscosity
For 1300mPas, and the when a length of 10h of the viscosity is maintained, reflecting surface is fixed on to the executing agency for being used for reflecting surface operation
On, and be placed in vacuum environment case together；
It is 2Pa that S4, vacuum environment case, which are evacuated to absolute vacuum degree in case, and temperature is 20 DEG C, and keeps 1h in this state；
S5, reflecting surface is pressed on the mold of resin using executing agency, is made in the tree between mold and reflecting surface
Rouge is extruded thinning until spreading over whole surface, this process maintains 1h；
Vacuum in S6, removal vacuum environment case, restores to normal pressure, and then temperature rises to 35 DEG C, keeps the temperature 36h to solidify tree
Rouge layer；
After the completion of S7, solidification, it is down to room temperature, is demoulded after taking-up.
Comparative example 3
This comparative example provides a kind of composite material antenna reflective face forming method, specific as follows:
S1, by mirror surface with sand paper uniform grinding to surface without smooth domain；
S2, will after reflecting surface shaping mould removing surface coat release agent it is spare；
S3, the epoxy resin prepared is poured on mold, the solidification temperature of the epoxy resin is 35 DEG C, at this time resin viscosity
For 1300mPas, and the when a length of 10h of the viscosity is maintained, reflecting surface is fixed on to the executing agency for being used for reflecting surface operation
On, and be placed in vacuum environment case together；
It is 2Pa that S4, vacuum environment case, which are evacuated to absolute vacuum degree in case, and temperature is 20 DEG C, and keeps 5h in this state；
S5, reflecting surface is pressed on the mold of resin using executing agency, is made in the tree between mold and reflecting surface
Rouge is extruded thinning until spreading over whole surface, this process maintains 1h；
S6, the temperature in vacuum environment case is risen to 35 DEG C, keeps the temperature 36h with curing resin layer；
After the completion of S7, solidification, vacuum is eliminated, room temperature is down to, is demoulded after taking-up.
The mirror surface state that above-described embodiment and comparative example obtain is as shown in table 1.
The resin layer surface of table 1 embodiment and comparative example
| Embodiment | Resin layer surface result |
| Embodiment 1 | Bubble-free |
| Embodiment 2 | Bubble-free |
| Embodiment 3 | Bubble-free |
| Comparative example 1 | There is the bubble of a large amount of diameter < 2mm |
| Comparative example 2 | There are a large amount of island bubbles |
| Comparative example 3 | There is the bubble of a small amount of diameter < 2mm |
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on the figure or position
Relationship is set, description invention is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning must have
There is specific orientation, be constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (9)
1. a kind of high-precision composite material antenna reflective face forming method, which comprises the steps of:
S1, the surface of antenna reflective face is roughened, coats release agent on high-precision mold surface；
S2, it will be statically placed in high vacuum environment through step S1 treated antenna reflective face and high-precision mold and resin；
S3, under high vacuum environment, resin is imposed on the surface for being coated with release agent of high-precision mold, then by antenna-reflected
Face pressure is on resin；
S4, under high vacuum environment, after resin layer is paved with the surface of high-precision mold, stand a period of time restore normal pressure；
S5, antenna reflective face demoulded after resin solidification, forms zero bubble resin layer on antenna reflective face surface.
2. high-precision composite material antenna reflective face forming method according to claim 1, which is characterized in that the resin
Curing reaction temperature be 15~45 DEG C, curing reaction time of the resin is 24~48h.
3. high-precision composite material antenna reflective face forming method according to claim 2, which is characterized in that the resin
MV minium viscosity in 15~45 DEG C of temperature ranges is 300~2000mPas, and the resin maintains the MV minium viscosity
When a length of 7~12h.
4. high-precision composite material antenna reflective face forming method according to claim 1, which is characterized in that the resin
Including epoxy resin.
5. high-precision composite material antenna reflective face forming method according to claim 1, which is characterized in that step S2,
In S3 and S4, the absolute vacuum degree of the high vacuum environment is 0~4Pa.
6. high-precision composite material antenna reflective face forming method according to claim 1, which is characterized in that step S2,
S3 and S4 is under same high vacuum environment.
7. high-precision composite material antenna reflective face forming method according to claim 1, which is characterized in that step S2
In, when a length of 4~6h of the standing.
8. high-precision composite material antenna reflective face forming method according to claim 1, which is characterized in that step S4
In, when a length of 0.5~1.5h of the standing.
9. a kind of high-precision composite material antenna reflective face of forming method preparation according to claim 1.
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| CN201910616955.2A CN110474169B (en) | 2019-07-09 | 2019-07-09 | High-precision composite material antenna reflecting surface forming method |
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| CN111098524A (en) * | 2019-12-12 | 2020-05-05 | 上海复合材料科技有限公司 | Device and method suitable for vacuum replication of high-precision antenna reflecting surface |
| CN111825954A (en) * | 2020-06-30 | 2020-10-27 | 上海复合材料科技有限公司 | Normal-temperature curing resin system for copying antenna reflecting surface and preparation method thereof |
| CN111864403A (en) * | 2020-06-30 | 2020-10-30 | 上海复合材料科技有限公司 | High-precision reflecting surface forming method |
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| CN110474169B (en) | 2021-05-21 |
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